Free online calculators & tools

Simple tools that just work — fast, free, and private. No signup, no download.

100% free No signup Works in your browser Nothing uploaded

Photo & Image Tools

Edit, resize, and convert pictures — right on your phone, nothing uploaded.

Image Resizer Resize a photo by pixels or percent and download it. PNG, JPEG, or WebP. Image Format Converter Convert an image between PNG, JPG, and WebP, then download it. Compress Image to Size Shrink a photo under 100 KB, 200 KB, or a size you choose. Right in your browser. Crop Image Into a Circle Turn any photo into a round picture with a transparent background. Passport & ID Photo Maker Size a photo to passport or ID requirements and print it at home. Images to PDF Converter Combine JPG, PNG, or WebP images into one PDF. Reorder pages, then download. 🔥 Hot PDF to Word Converter Turn a PDF into an editable Word (.docx) document — free, right in your browser. Signature Maker Draw or type your signature and download it as a transparent PNG. On-device.

Everyday Calculators

Quick answers for the math that comes up in daily life.

Percentage Calculator Percent of a number, percent change, and discounts. Instant results. Tip Calculator & Bill Splitter Work out the tip and total, then split the bill evenly. Instant results. Discount Calculator Sale price, how much you save, and the final price with tax for any percent off. Cooking Measurement Converter Cups to ml, tablespoons to teaspoons, oven °F to °C, plus a recipe scaler. Unit Converter Length, weight, temperature, speed, area and data sizes. km to miles, kg to lb, °C to °F. BMI Calculator Body Mass Index, weight category, and healthy weight range. Metric or imperial. Ideal Weight & Macro Calculator Ideal body-weight range (Devine, Hamwi, Robinson, Miller) plus your daily protein, carb, and fat macros. GPA Calculator Weighted grade point average on the 4.0 scale. Add courses by grade and credit hours. Hours Calculator (Time Card) Add clock-in / clock-out times per day, subtract breaks, total a week, and estimate pay. Handles overnight shifts. Age Calculator Your exact age in years, months and days, totals lived, and a next-birthday countdown. Days Between Dates Duration between two dates: total days, weeks, business days, and a years/months/days breakdown. Holiday Countdown How many days until Christmas, Thanksgiving, or any date? Live countdown. Countdown Timer Set minutes and seconds for cooking, study or workouts. Presets, pause and a beep when time's up. Stopwatch Count up with a precise HH:MM:SS.cc readout, record unlimited laps with best/worst splits, and copy them. Pomodoro Timer Focus in 25-minute sessions with short and long breaks. Configurable lengths, auto-start and a gentle chime. Calorie Calculator Estimate your daily calories (TDEE) and targets to lose, maintain, or gain weight. Uses the Mifflin–St Jeor formula. Pregnancy Due Date Calculator Estimate your baby's due date from your last period or conception date, plus how many weeks along and your trimester. Ovulation Calculator Estimate your ovulation date, most fertile days, and next period from your last period and cycle length. Sleep Calculator Find the best bedtimes or wake-up times based on 90-minute sleep cycles. Instant results. Fraction Calculator Add, subtract, multiply, or divide fractions and mixed numbers. Answers in lowest terms and as a decimal. Average Calculator Paste a list of numbers to get the mean, median, mode, range, sum, count, and standard deviation. Date Calculator Add or subtract days, weeks, months, or years from any date to find a future or past date. Time Zone Converter Convert a date and time between cities and time zones worldwide. Handles daylight saving automatically. Pace Calculator Find running pace, finish time, or distance in min/km or min/mile, plus 5K, 10K, half and full marathon times. Aspect Ratio Calculator Simplify any width × height into its ratio (like 1920×1080 → 16:9), or lock a ratio and resize. Paint Calculator Work out how much paint to buy from your room size, doors and windows, and number of coats. Tile Calculator See how many tiles and boxes to buy from your room and tile size, with a waste allowance for cuts. Random Number Generator Pick one or many random numbers in any range, with an option for no repeats. Great for raffles and draws. Roman Numeral Converter Turn any number (1–3999) into Roman numerals, or convert a Roman numeral back to a number. Recipe Scaler Paste an ingredient list, set old and new servings, and halve, double, or resize every amount.

Money & Finance

Plan your paycheck, loans, and what your dollar is really worth.

Make & Share

Create documents and codes you can download and send in seconds.

QR Code Generator Create a QR code for a link, WiFi, or contact card. Save as PNG or SVG. Invoice Generator Make a clean PDF invoice and download it in seconds. No watermark. Password Generator Create a strong random password on your device. Choose length and characters — nothing uploaded. Word & Character Counter Count words, characters, sentences, and paragraphs as you type, with reading and speaking time.

Developer & Text Tools

Format, convert, and generate code and text — right in your browser, nothing uploaded.

Base64 Encode & Decode Convert text to Base64 or decode it back, with full Unicode (UTF-8) and URL-safe support. JSON Formatter & Validator Beautify, indent, minify, and validate JSON instantly, with clear error line numbers. Markdown to HTML Converter Convert Markdown to clean HTML in your browser with a live preview — copy or download the result. Text Diff Checker Paste two blocks of text and see line-by-line additions, deletions, and unchanged lines. UUID Generator Create one or many random version-4 UUIDs (GUIDs) instantly, with optional uppercase and no hyphens. Color Converter Convert between HEX, RGB, and HSL, or pick a color and copy the CSS code. Works two ways. Binary, Hex & Decimal Converter Convert between binary, octal, decimal, and hexadecimal. Type in any base and the others update live. Text Case Converter Switch text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and more. Bionic Reading Converter Bold the first letters of each word to help your eyes skim and focus — copy formatted or as bold text. Lorem Ipsum Generator Create placeholder dummy text by words, sentences, or paragraphs, and copy it with one click. Morse Code Translator Convert text to Morse code and back instantly. Supports letters, numbers, and punctuation.

2026 Paycheck Calculators by State

See your take-home pay after federal tax, FICA, and state income tax.